<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .common{
            width: 100px;
            height: 100px;
            border: 2px saddlebrown solid;
        }
        div{

            /* 内容溢出隐藏 */
            overflow: hidden;
            /* 隐藏 */
            /* 会占据原位置 */
            /* visibility: hidden; */
            /* opacity: 0; */
            /* 不会占据原位置 */
            /* display: none; */

        }
    </style>
</head>
<body>
    <div class="common">
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    </div>
</body>
</html>